Technical Difficulties at Nasdaq Trip Up Stock Traders

By

Jacob Bunge and

Matt Jarzemsky

Updated Jan. 3, 2013 4:32 p.m. ET

A technical issue affecting securities listed on the Nasdaq Stock Market resulted in stock prices and index levels that appeared frozen in time Thursday afternoon—including the Nasdaq Composite Index, which seemed to linger at 3166.94 for more than 15 minutes, according to data from Nasdaq's website and other market-data sources.

While Nasdaq-listed stocks continued to trade on some exchanges, brokers reported anomalies in the prices...